Acid-proof air-nozzle and valve.



B. MACDONALD. ACID PROOF AIR NOZZLE AND VALVE.

APPLICATION FILED MAR. 25, 1914.

1,116,308. Patented Nov. 3, 1914.

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//Vl/E/VTOR 2 "Q5" BY ATTORNEYS BERNARD MACDONALD, OF SOUTH PASADENA,CALIFORNIA.

ACID-PROOF AIR-NOZZLE AND VALVE.

Specification of Letters Patent.

Patented Nov. 3, 1914:.

Application filed March 25, 1914. Serial No. 827,047.

To all 'whom it may concern:

Be it known that I, BERNARD MACDONALD, a citizen of the United States,residing at South Pasadena, county of Los Angeles, State of California,have invented certain new and useful Improvements in Acid- Proof Air--lozzles and Valves; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to apparatus for handling acid solutions andparticularly to apparatus for use in the treatment of ore pulp, slimesand the like.

In apparatus for treating ore slimes it is frequently desirable toprevent to as large an extent as possible the settling of solids andthickened portions in the slimes, since if such portions of the slimeswere to collect upon the bottom of the receptacle, dissolving would takeplace much more slowly. In order to guard against collecting of thethicker portions of ore slinles it has been common heretofore to providethe recep tacle for such slimes with transfer pipes through which thematerial is raised continuously from the bottom portion of thereceptacle to the upper portion thereof.

The present invention is directed to the provision of apparatus forhandling acid solutions under conditions which make the use ofacid-proof material desirable. The apparatus comprises a transfer pipeor tube through which the material is forced and a nozzle for compressedair positioned for forcing the acid solution through the transfer pipe,these parts being made of wood so as to be proof against attack by theacid.

The invention involves the provision of a novel form of compressed airnozzle which is of marked simplicity in construction, which is reliableand efficient in operation, the parts of which may be readilymanufactured and assembled at low cost and which permits of the use ofacid-proof material throughout.

The invention also involves an improved method of mounting the nozzleupon its support in cooperative relation to the transfer pipe andimproved means for making connection from the compressed air pipe to thenozzle.

These and other features of the invention will be better understood byreference to the following description taken in connection with theaccompanying drawings which show the preferred embodiment of theinventlon.

In these drawings, Figure 1 is a central section of a tank for treatingore 'slime's. Fig. 2 is an enlarged view in section through the nozzleand the lower end of the tank and transfer pipe. Fig. 3 is a detail viewin horizontal section on line 33 of Fig. 2 showing the connection of theair supply pipe to the nozzle.

Referring to these drawings, A indicates a tank of substantial sizepreferably constructed of wooden staves and 'rnounted on a suitable baseB. \Vithin the tank A are a plurality of transfer pipes C each arrangedin a vertical position. Each of these pipes is supported upon the bottomD of the tank in any suitable mannerwi'th its lower end a short distanceabove the bottom D. In the drawings each pipe is shown as mounted uponfour uprights d rising from the bottom of the tank and having theirupper ends secured to the lower end of the pipe 0. The solution in thetank is forced upwardly through the pipes C and out through outlets 0near the upper end of the pipes C. These outlets are disposed parallelto the adjacent side wall of the tank so that the discharge therefromcauses the material in the tank to take up a circular motion, asindicated by the dotted line in Fig. 1. This circular motion of thematerial aids in retarding the settling of the thicker portions of thesolutions.

The material is caused to flow. upwardly in the pipes C by compressedair admitted to the lower ends of the pipes. 'For this purpose nozzle Eis provided. This nozzle, like the pipes C, is made of wood so as to beproof against attack by acid in the solution. The nozzle is circular incross-section and a portion of it is tapered as shown at e. A taperedopening is provided in the bottom D of the tank for the reception of thenozzle E, and the nozzle is mounted in position by passing it upwardlythrough the opening in the bottom of the tank untilthe tapered portion eengages and wedges against the wall of the tapered opening in the bottomof the tank. In this way the nozzle may be quickly mounted in positionin such a manner as to preclude leakage around the nozzle, and also licmaterial. Preferably the ball. is glass or earthenware, and its surfaceis made so smooth that the valve will seat itself accurately upon thewall at the junction of the passage-Way c and the enlargement a The wallof the nozzle above the seat for the valve is provided with a pluralityof transverse openings 6 The upper end of the enlarged portion 6 of thepassage-way through the nozzle is threaded to receive a plug 6, whichconstitutes .a retainer for holding the ball valve F in its positionwithin the nozzle. This retainer, however, permits such upward movementof the ball F as will allow theair to pass freelyfrom the passage-way 6through sage-ways e I WVhen the nozzle is mounted in position as abovedescribed, its upper end is close to and preferably slightly withinthelower end of the transfer pipe C. An air supply pipe G is connected tothe lower end of the nozzle E below the bottom of the tank. of this pipeGr is secured to a metallic plate 9 curved toecorrespond with thecurvature the transverse pas- I of the nozzle E and having an openingalining with the opening in the pipe G. A bail gv is adapted to encirclethe nozzle, its ends passing through the ends of the plane 9 and havingnuts on the ends thereof by which the bail and the plate 9 may be causedto grip the nozzle E firmly. The nozzle has a transverse opening thereinleading to the passage-way c with which the opening in .the plate 9alines when the parts are assembled in the manner shown in Figs. 2 and3. The opening e extends all the way to the bottom of the nozzle and aplug g is provided for closing the lower end of the passageway. Thisplug may be readily withdrawn to permit of clearing the passage-way e ofparticles which may become lodged therein.

In operation, the compressed .air passes from the pipe G into andthrough the nozzle- E, raising the valve 15 and issuing through thetransverse openings e. The air The end wooden nozzle mounted in anupright position with its upper end within'and close to the lower'end ofthe pipe, said nozzle having a central passage therethrough which isenlarged in diameter near its upper end to provide a valve seat at thelower end of the enlarged portion of the passage and said enlargedportion extending from the said seat'to the upper end of the nozzle,transverse openings in' the wall of the nozzle above the "alve seat, aball valve of nonmetallic material located in said enlargement andcoacting .with the valve seat, and a retainer threaded into the upperend of the passage through the nozzle.

2. The combination of a support having a taperedopening therein, awooden pipe mounted in an upright position over said opening and havingits lower end open, a wooden nozzle extending through the opening insaid support and having the exterior thereof tapered to Wedge in saidtapered opening, said nozzle being in alinement with the pipe and havingits upper end adjacent to the lower end of the pipe, and a valve in thenozzle controlling the passageway therethrough. '1

3. The combination of a support having an opening therein, a wooden pipemounted in an upright position over said opening and having its lowerend open, a nozzle mounted in the opening in said support with its upperend adjacent to the lower end of the pipe, a compressed air pipe belowsaid support, a plate secured to the end of the pipe and lying againstthe lower end of the nozzle, and a bail encircling the pipe and havingits ends secured to the ends of the plate, said nozzle having apassageway therethrough the lowerend of which extends transversely andcoacts with an opening through said plate leading to the interior of thecompressed air pipe.

lln testimony whereof I afiix my signature, in presence of twowitnesses.

BERNARD MALGDONALD.

